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United States Patent | 5,251,263 |
Andrea ,   et al. | October 5, 1993 |
Disclosed is a headset apparatus for use in an intercommunications system, the headset suppressing both noise in the vicinity of a transducer delivering sound to an operator's ear and in outgoing speech from the operator.
Inventors: | Andrea; Douglas (Old Brookville, NY); Kowalski; John (Greenlawn, NY) |
Assignee: | Andrea Electronics Corporation (Long Island City, NY) |
Appl. No.: | 887500 |
Filed: | May 22, 1992 |
Current U.S. Class: | 381/71.6; 381/71.7; 381/72; 381/94.2 |
Intern'l Class: | G10K 011/16 |
Field of Search: | 381/71,72,94,74 379/430 |
3702644 | Nov., 1972 | Fowler. | |
4025734 | May., 1977 | Aloupis | 381/151. |
4241805 | Dec., 1980 | Chance. | |
4261708 | Apr., 1981 | Gallagher. | |
4494074 | Jan., 1985 | Bose. | |
4539708 | Sep., 1985 | Norris. | |
4630304 | Dec., 1986 | Borth. | |
4649505 | Mar., 1987 | Zinser. | |
4654871 | Mar., 1987 | Chaplin et al. | 381/72. |
4736432 | Apr., 1988 | Cantrell. | |
4862506 | Aug., 1989 | Landgarten. | |
4878188 | Oct., 1989 | Ziegler. | |
4887229 | Dec., 1989 | Weiss. | |
4930156 | May., 1990 | Norris. | |
4947356 | Aug., 1990 | Elliott. | |
4953217 | Aug., 1990 | Twiney et al. | 381/72. |
4959865 | Sep., 1990 | Stettiner. | |
4977600 | Dec., 1990 | Ziegler. | |
4985925 | Jan., 1991 | Langberg. | |
5010576 | Apr., 1991 | Hill. | |
5018202 | May., 1991 | Takahashi. | |
5029218 | Jul., 1991 | Nagayasu. | |
5033082 | Jul., 1991 | Eriksson et al. | 381/94. |
5052510 | Oct., 1991 | Gossman. | |
5091954 | Feb., 1992 | Sasaki. | |
5113428 | May., 1992 | Fitzgerald | 379/430. |
5117461 | May., 1992 | Moseley | 381/72. |
5125032 | Jun., 1992 | Meister et al. | 381/151. |
5134659 | Jul., 1992 | Moseley | 381/72. |
5138664 | Aug., 1992 | Kimura et al. | 381/72. |
5182774 | Jan., 1993 | Bourk | 379/430. |
Foreign Patent Documents | |||
2172769 | Sep., 1986 | GB | 381/72. |
B. Widrow et al., "Adaptive Noise Cancelling: Principles and Applications", Proc. IEEE, vol. 63, pp. 1692-1716, Dec. 1975. B. Widrow et al., "Adaptive Antenna Systems", Proc. IEEE, vol. 55, No. 12, Dec. 1967. M. Sambur, "Adaptive Noise Cancelling for Speech Signals", IEEE Trans. Acoust. Speech, and Sig. Proc., vol. ASSP-26, No. 5, Oct. 1978. K. Ogata, Modern Control Engineering, Ch. 10, Design and Compensation Techniques, pp. 474-508, Prentice Hall, 1968. B. Kuo, Automatic Control Systems, Ch. 10, Introduction to Control Systems Designs, pp. 504-510, Ch. 11, Introduction to Optimal Control, pp. 574-585, Prentice Hall, 1965. A. Papoulis, Probability, Random Variables and Stochastic Processes, Ch. 13-7, Adaptive Noise Filters, pp. 467-474, 2nd Ed. McGraw Hill, 1985. D. Luenberger, Optimization by Vector Space Methods, Ch. 5, Dual Spaces, pp. 134-138, McGraw Hill, 1969. S. Boll, "Suprresion of Acoustic Noise in Speech using Spectral Subtraction", IEEE Trans. On Accoustics, Speech, and Signal Processing, vol. ASSP-27, pp. 113-120, Apr. 1979. D. Youla et al., "Image Restoration by the Method of Convex Projections: Part 1-Theory", IEEE Trans. On Medical Imaging, vol. MI-1 No. 2, pp. 81 Oct. 1982. White, "Considerations in High-fidelity Moving-Coil Earphone Design", pp. 188-194, IEEE Transactions On Audio, pp. 188-194, Nov.-Dec. 1963. L. Rabiner & R. Schafer, Digital Processing of Speech Signals, pp. 130-135, Prentice Hall, 1978. L. Rabiner et al., "A Comparative Performance Study of Several Pitch Detection Algorithms", IEEE Transactions On Acoustics, vol. ASSP-24, vol. No. 5, pp. 399-, Oct. 1976. C. Beranek, Acoustics Ch. 5, Acoustic Components, pp. 116-126, Ch. 6 Pressure Microphone, pp. 157-164, Ch. 7, Direct-Radiatior Loudspeakers, pp. 183-193, American Institute of Physic's, 1986. |